Those are fair points, but it seems you think that he's buying the A8 6600k when he already has it in his current PC.
Lets simplify the question.
What would you do if you already have a AMD A8 6600K & a 750Ti....
Buy an Intel Skylake 6600 & keep the 750Ti or Keep the A8 6600K & buy a GTX 970?
A friend has asked me to price up a new PC for him as he wants a better gaming rig.
His current spec is:
AMD A8 6600K CPU
Gigabyte GA-F2A78M-D3H mobo
8Gb DDR3 1600Mhz Ram
Nvidia GTX 750ti
Intel Skylake i5 6600,
250GB Samsung 850 Evo M2
MSI Gaming B150 M3 Intel mobo
Stupid UK pricing system (again)
Currently the cheapest 650Ti Boost (on pre order) is £141 & the a 2GB 660 (non Ti) is £142
If this price remains constant for the first few months there will be no reason to buy it - just get the 660 instead. But hopefully once they come into stock prices...